MEDCO HEALTH SOLUTIONS

CUSIP: 58405U102 Class: COMMON STOCK

Zurcher Kantonalbank (Zurich Cantonalbank)'s Holding History (CIK: 0001368163)

Note: Option positions (PUT/CALL) are excluded.

Q1 2012
Shares 16,517 Value ($000) $1,161 Avg Close — Range —
Q4 2011
Shares 17,825 Value ($000) $996 Avg Close — Range —